Drill bit for improving boulder crushing and transferring capability of long spiral drilling machine
By designing spiral blades with conical spades and cutting teeth, as well as drill tips with alloy rings, the problem of insufficient crushing and transfer capabilities of traditional drill bits in pebble soil layers is solved, achieving more efficient crushing and drifting effects.
Patent Information
- Application Number
- CN202421927018.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-09
AI Technical Summary
When traditional long spiral drill bits encounter pebbles, they cannot effectively cut and break down the consolidated plate-like pebbles layer, which affects the drill bit's ability to break and transfer drift stones.
A drill bit is designed, with spiral blades in the axial direction, and the tail end of the spiral blade can be detached and installed with a conical shovel plate. The tail end of the shovel plate is equipped with cutting teeth, and the drill tip is equipped with a ring gear and inlay teeth with gradually narrowing diameter from top to bottom.
Through the cooperation of drill tips and inlay teeth, large pieces of pebbles can be broken into small-volume stones, improving the crushing quality; the design of the shovel board and cutting teeth can further break down the unfinished pebbles and improve the drill bit's ability to transfer drift stones.
Smart Images
Figure CN222924400U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of drill bits, and particularly relates to a drill bit for improving the ability of a long auger drill to break and transfer boulders. Background Art
[0002] The long auger drill is mainly used for the construction of foundation pile holes in various construction projects such as industrial and civil buildings, electricity, and transportation. The long auger drill drives the auger rod and the drill bit through the drill power head to make the spiral blades rotate downward to slice. The cut soil rises along the spiral blades with the rotation of the drill bit and is automatically output outside the hole to form. Among them, the drill bit is the main accessory to ensure its rotary drilling ability.
[0003] Since the long auger drill bit is mainly applicable to soil layers such as sandy soil, clay, and silty soil, however, when rotary drilling a hole, due to the complex geological structure of the soil layer, when encountering a local pebble soil layer, because the pebble layer is in a long-term compressed state, the pebbles, sand, and soil are solidified into a plate shape and combined very tightly. The traditional long auger drill bit cannot effectively cut and disperse the solidified plate-shaped pebble layer quickly, and the pebble layer still remains in a large block. The large pebble blocks cannot be transported to the outside of the hole along with the small pebble particles through the spiral blades, which will also affect the ability of the drill bit to transfer boulders. Content of the Utility Model
[0004] The purpose of the utility model is to provide a drill bit for improving the ability of a long auger drill to break and transfer boulders in order to solve the above-mentioned problems.
[0005] The technical scheme adopted by the utility model is as follows: A drill bit for improving the ability of a long auger drill to break and transfer boulders, including a drill bit core tube. A spiral blade is arranged on the outer peripheral surface of the drill bit core tube along the axial direction. A shovel plate with a conical cross-section is detachably installed at the tail end of the spiral blade. A plurality of cutting teeth are arranged at equal intervals at the tail end of the shovel plate; A drill tip is arranged at the bottom end of the drill bit core tube. The drill tip is provided with a plurality of tooth rings with gradually narrowing diameters from top to bottom. A plurality of inserted teeth are arranged at equal intervals on the outer peripheral surface of the tooth ring.
[0006] In a preferred embodiment, the shovel plate is wider at the top and narrower at the bottom as a whole, the shovel plate inclines downward, and the tail end of the shovel plate is located on the side of the drill tip.
[0007] In a preferred embodiment, a square socket is integrally arranged at the top end of the shovel plate. A slot adapted to insert the square socket is opened at the tail end of the spiral blade. Mounting holes are opened on both sides of the square socket. The square socket is inserted into the slot and fixed by bolts.
[0008] In a preferred embodiment, the overall cross-sections of the cutting teeth and the inserted teeth are both triangles that are wider inside and narrower outside.
[0009] In a preferred embodiment, both the cutting teeth and the inserted teeth are made of cemented carbide material.
[0010] In a preferred embodiment, the drill tip as a whole is a conical shape that is wider at the top and narrower at the bottom.
[0011] In a preferred embodiment, a docking flange for docking with an external drill pipe is provided at the upper end of the drill bit core pipe.
[0012] In a preferred embodiment, a channel for conveying concrete is provided in the middle of the drill bit core pipe, and a drill bit door communicating with the channel is further provided on the lower side wall of the drill bit core pipe.
[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:
[0014] 1. In the present utility model, the drill tip is designed to be conical, and a plurality of sets of alloy inserted teeth are circumferentially provided at the bottom of the drill tip. When drilling, large cobblestones can be broken into small-sized stones through the cooperation of the drill tip and the alloy inserted teeth, which can ensure the improvement of the overall crushing quality. Moreover, during the crushing process, the inserted teeth can also play a role in dispersing, avoiding large cobblestones from getting stuck at the spiral blade.
[0015] 2. In the present utility model, a shovel plate with cutting teeth is designed at the tail end of the spiral blade. After preliminary crushing, a small part of the cobblestones that are not completely dispersed will be cut and dispersed through the cutting teeth and the shovel plate, avoiding the accumulation of undispersed cobblestones getting stuck at the spiral blade, so as to improve the ability of the drill bit to transfer boulders. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a three-dimensional structural schematic diagram of the whole of the present utility model;
[0017] Figure 2 is a planar structural schematic diagram of the drill tip in the present utility model;
[0018] Figure 3 is a cross-sectional planar structural schematic diagram of the shovel plate in the present utility model.
[0019] Markings in the figure: 1 - docking flange, 2 - spiral blade, 3 - shovel plate, 301 - cutting teeth, 302 - square socket, 303 - mounting hole, 4 - bolt, 5 - drill bit core pipe, 6 - drill tip, 601 - tooth ring, 602 - inserted teeth, 7 - drill bit door. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0021] Reference Figures 1-3 , a drill bit for improving the ability of a long auger drill to break and transfer boulders, including a drill bit core pipe 5. A spiral blade 2 is arranged on the outer peripheral surface of the drill bit core pipe 5 along the axial direction. The designed spiral blade 2 can transport sandy soil or broken sand and gravel out of the hole to ensure the smooth operation of the drilling work.
[0022] Furthermore, a shovel plate 3 with a conical cross-section is detachably installed at the tail end of the spiral blade 2. A plurality of cutting teeth 301 are equidistantly arranged at the tail end of the shovel plate 3. The shovel plate 3 with cutting teeth 301 is designed at the tail end of the spiral blade 2. After preliminary crushing, a small part of the uncompletely broken pebbles will be cut and broken through the cooperation of the cutting teeth 301 and the shovel plate 3, avoiding the accumulation of unbroken pebbles stuck at the spiral blade 2, so as to improve the ability of the drill bit to transfer boulders.
[0023] Furthermore, a drill tip 6 is arranged at the bottom end of the drill bit core pipe 5. The drill tip 6 is provided with a plurality of tooth rings 601 with gradually narrowing diameters from top to bottom. A plurality of insert teeth 602 are equidistantly arranged on the outer peripheral surface of the tooth ring 601. The drill tip 6 is integrally a conical shape with a wider top and a narrower bottom. The drill tip 6 is designed as a conical shape, and a plurality of sets of alloy insert teeth 602 are arranged circumferentially at the bottom of the drill tip 6. When drilling, the large boulder blocks can be broken into small-sized stones through the cooperation of the drill tip 6 and the insert teeth 602, which can ensure the improvement of the overall crushing quality. Moreover, during the crushing process, the insert teeth 602 can also play a role in breaking up, avoiding large boulders getting stuck at the spiral blade 2 subsequently.
[0024] Among them, the insert teeth 602 all incline outwards, and the inclination angle gradually decreases from bottom to top.
[0025] Furthermore, the shovel plate 3 is integrally wider at the top and narrower at the bottom. The shovel plate 3 inclines downwards, and the tail end of the shovel plate 3 is located on the side of the drill tip 6. A square socket 302 is integrally provided at the top end of the shovel plate 3. A slot adapted for the insertion of the square socket 302 is opened at the tail end of the spiral blade 2. Mounting holes 303 are opened on both sides of the square socket 302. The square socket 302 is inserted into the slot and fixed by bolts 4. Since the shovel plate 3 is in a continuous working state, its service life is relatively shorter than that of the drill tip 6. After being used for a period of time, the shovel plate 3 can be removed, turned over and then fixed at the tail end of the spiral blade 2 again, so that the shovel plate 3 can be fully utilized, and correspondingly, the service life of the shovel plate 3 is also greatly improved.
[0026] Furthermore, the overall cross-sections of the cutting teeth 301 and the insert teeth 602 are both triangles with a wider inner side and a narrower outer side. The cutting teeth 301 and the insert teeth 602 are both made of cemented carbide materials. The hardness and wear resistance of the cemented carbide materials are significantly better than those of steel materials, which can meet the crushing operations in relatively hard strata.
[0027] Furthermore, a docking flange 1 for docking with an external drill pipe is provided at the upper end of the drill bit core pipe 5. Through the docking flange 1, different types of drill bits can be selected according to the formation conditions (for example, traditional drill bits can be used in sandy soil and clay formations). At the same time, when the drill bit is damaged, the docking flange 1 can be directly disassembled and replaced.
[0028] Furthermore, a channel for conveying concrete is provided in the middle of the drill bit core pipe 5. A drill bit door 7 communicating with the channel is also provided on the lower side wall of the drill bit core pipe 5. A cover plate is rotatably connected to the drill bit door 7 through a pin shaft. When grouting, the concrete flows into the drill bit door 7 through the channel, and the cover plate is pushed open by the gravity of the concrete, thereby realizing the grouting operation.
[0029] In summary, the drill tip is designed to be conical, and multiple groups of alloy insert teeth are circumferentially provided at the bottom of the drill tip. When drilling, large boulder blocks can be broken into small-volume stones through the cooperation of the drill tip 6 and the insert teeth 602, which can ensure the improvement of the overall crushing quality. At the same time, a shovel plate 3 with cutting teeth 301 is designed at the end of the spiral blade 2. After preliminary crushing, a small part of the uncompletely broken boulders will be cut and dispersed by the cutting teeth 301 and the shovel plate 3, avoiding the accumulation of unbroken boulders stuck at the spiral blade 2, so as to improve the ability of the drill bit to transfer boulders.
[0030] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A drill bit for improving the ability of a long spiral drill to crush and transfer boulders, comprising a drill bit core tube, characterized in that: The outer circumferential surface of the drill core tube is axially provided with a spiral blade, and the tail end of the spiral blade is detachably mounted with a shovel plate with a conical cross section, and the tail end of the shovel plate is evenly spaced with a plurality of cutting teeth; the bottom end of the drill core tube is provided with a drill tip, and the drill tip is provided with a plurality of gear rings with gradually narrowing diameters from top to bottom, and the outer circumferential surface of the gear ring is provided with a plurality of insert teeth at evenly spaced intervals.
2. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: The shovel plate is generally wide at the top and narrow at the bottom, the shovel plate is inclined downward, and the tail end of the shovel plate is located on the side of the drill tip.
3. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: A square socket is integrally formed at the top of the shovel plate, a slot adapted for inserting the square socket is formed at the tail end of the spiral blade, mounting holes are formed on both sides of the square socket, and the square socket is inserted into the slot and fixed by bolts.
4. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: The overall cross-sections of the cutting teeth and insert teeth are both triangles that are wide inside and narrow outside.
5. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: The cutting teeth and insert teeth are both made of hard alloy material.
6. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: The drill tip is in the shape of a cone that is wider at the top and narrower at the bottom.
7. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: The upper end of the drill core tube is provided with a butt flange butted with an external drill rod.
8. A drill bit for improving the ability of a long spiral drill to break and transfer boulders as claimed in claim 1, characterized in that: A passage for conveying concrete is provided in the middle of the drill core tube, and a drill door connected to the passage is provided on the lower side wall of the drill core tube.